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Annotation of coherent/a/usr/include.b4ps2/dumptape.h, revision 1.1.1.1

1.1       root        1: /* (-lgl
                      2:  *     COHERENT Version 3.0
                      3:  *     Copyright (c) 1982, 1990 by Mark Williams Company.
                      4:  *     All rights reserved. May not be copied without permission.
                      5:  -lgl) */
                      6: /*
                      7:  * Dump tapes.
                      8:  * A dump tape begins with a header
                      9:  * record. This contains the attributes of the
                     10:  * tape.
                     11:  * The remainder of the tape is filled with
                     12:  * arrays of dumpdata records. The map comes first,
                     13:  * then all the directories, then all the files.
                     14:  */
                     15: 
                     16: #include <sys/types.h>
                     17: #include <sys/dir.h>
                     18: #include <sys/ino.h>
                     19: 
                     20: /*
                     21:  * Dump tape header.
                     22:  * All entries are in cannonical
                     23:  * format on the tape.
                     24:  */
                     25: struct dumpheader
                     26: {
                     27:        int     dh_magic;               /* Magic number */
                     28:        ino_t   dh_nino;                /* # of inodes on file system */
                     29:        time_t  dh_bdate;               /* Date at beginning of dump */
                     30:        time_t  dh_ddate;               /* Dump since date */
                     31:        int     dh_level;               /* Dump level */
                     32:        int     dh_reel;                /* Reel number in dump */
                     33:        fsize_t dh_nbyte;               /* Length of disc */
                     34:        int     dh_blocking;            /* Blocking factor */
                     35:        char    dh_dev[DIRSIZ];         /* Name of dumped device */
                     36:        char    dh_fname[6];            /* File system name */
                     37:        char    dh_fpack[6];            /* File system pack name */
                     38:        int     dh_checksum;            /* Byte checksum */
                     39: };
                     40: 
                     41: #define        DH_MAG  0123456                 /* Magic number */
                     42: 
                     43: /*
                     44:  * Dump data blocks.
                     45:  * These are all a big union.
                     46:  * They are packed into much larger
                     47:  * blocks on the tape.
                     48:  */
                     49: union  dumpdata
                     50: {
                     51:        struct  {
                     52:                int     dd_type;        /* Type = DD_EOT */
                     53:        } dd_st1;
                     54: 
                     55:        struct  {
                     56:                int     dd_type;        /* Type = DD_DATA */
                     57:                ino_t   dd_ino;         /* Inode number */
                     58:                daddr_t dd_block;       /* Block number in file */
                     59:                int     dd_size;        /* Bytes used in this block */
                     60:                char    dd_data[BUFSIZ];/* Data */
                     61:        } dd_st2;
                     62: 
                     63:        struct  {
                     64:                int     dd_type;        /* Type = DD_INO */
                     65:                ino_t   dd_ino;         /* Inode number */
                     66:                struct  dinode dd_dinode; /* On disc inode */
                     67:        } dd_st3;
                     68: 
                     69:        struct  {
                     70:                int     dd_type;        /* Type = DD_MAP */
                     71:                ino_t   dd_ino;         /* Base inode of this map block */
                     72:                int     dd_nmap;        /* # of map entries */
                     73:                char    dd_map[BUFSIZ]; /* Some map */
                     74:        } dd_st4;
                     75: };
                     76: 
                     77: #define        DD_EOT  0                       /* End of dump */
                     78: #define        DD_INO  1                       /* Inode */
                     79: #define        DD_DATA 2                       /* Data block */
                     80: #define        DD_MAP  3                       /* Map */
                     81: 
                     82: #define        DD_BUSY 01                      /* Inode in use */
                     83: #define        DD_DUMP 02                      /* Inode dumped */
                     84: #define        DD_DIR  04                      /* Inode is a directory */
                     85: #define        DD_DEJA 010                     /* Already seen flag (dump) */
                     86: #define        DD_HERE (DD_BUSY|DD_DUMP)       /* On the tape */
                     87: 
                     88: /*
                     89:  * This structure is used
                     90:  * to hold the dump dates in the
                     91:  * file `/etc/ddate'.
                     92:  */
                     93: struct idates {
                     94:        char    id_name[DIRSIZ];        /* Device name */
                     95:        int     id_incno;               /* Level */
                     96:        time_t  id_ddate;               /* The date of the dump */
                     97: };
                     98: 
                     99: #define        DDATE   "/etc/ddate"            /* Date file name */
                    100: #define        DTAPE   "/dev/dump"             /* Default dump tape */
                    101: #define        DFSYS   ""                      /* No default file system */

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